Chihuahua Puppy Growth Chart

Refer to the following chart for a prediction of your Chihuahua puppy's growth. It uses a puppy's current age and weight to predict their future weight.

Identifying a Chihuahua pup's future size is important for a number of reasons; it allows owners to purchase the right size crate, bed, collar/harness, and knowing their future size will help owners make smarter decisions regarding their home and general environment.

While there's no way to know exactly just how large a puppy will become, this chart follows the normal growth patterns of purebred Chihuahuas. The chart itself is pretty self-explanatory; the first column represents a puppy's age, while the additional nine columns represent their corresponding weight. Simply find your puppy's current age on the left-hand column under 'Birth' and scroll to the right until you find their current weight. Once you've located your puppy's current age and weight, look at the bottom of the same column for their predicted weight as an adult.

Note: some of the factors which may affect a Chihuahua puppy's growth include:

  • Genetics
  • Nutrition (see our post on choosing food for your Chihuahua)
  • Physical activity levels
  • Hormones
  • Presence of worms (not always noticeable in their bowel movements)
  • Overall health
Birth 2½ oz. 2¾ oz. 3 oz. 3½ oz. 4 oz. 4¼ oz. 4½ oz. 5 oz. 5½ oz.
1 Week 3¾ oz 4 5 7 8 9
2 Week 5 7 9 10 11 12½ 13½
3 Week 6 7 8 9 11 13 14 16 17½
4 Week 7 8 11 13 15 17 19½ 21
5 Week 8 9 11 13 15 17 19½ 22 24
6 Week 9 11 12½ 15 17½ 20 22 24 27
7 Week 10 12 14½ 17 19½ 22 24½ 27 30
8 Week 11 13 16 19 21½ 24 27 29 33
9 Week 12 15 17¼ 20 23 26 29 32 35
10 Week 13 16 19 22 25 28 31 34 38
11 Week 14 17 21 24 27 31 34 37 42
12 Week 15 19 22 26 30 33 37 41 45
13 Week 16 20 24 28 32 36 40 44 49
14 Week 17 22 26 30 34 39 43 47 52
15 Week 18 23 28 32 37 41 46 51 56
16 Week 19 25 30 34 39 44 49 54 59
17 Week 20 26 31 36 41 46 51 57 62
18 Week 21 28 33 37 43 48 54 60 65
19 Week 22 29 34 39 44 50 56 62 67
20 Week 23 30 35 41 46 52 58 64 70
21 Week 24 31 36 42 48 54 60 66 72
22 Week 25 32 37 43 49 56 62 68 74
23 Week 26 33 38 44 50 57 64 70 76
24 Week 26 33 39 45 51 58 65 71 78
25 Week 27 34 40 46 52 59 66 72 79
26 Week 27 34 40 47 53 60 67 73 80
18 Months 2 lb. 2½ lb. 3 lb. 3½ lb. 4 lb. 4½ lb. 5 lb. 5½ lb. 6 lb.

Referencing your Chihuahua puppy's current weight and age using this chart will provide a rough estimation of their future size. However, the most accurate representation of a pup's future weight is through their parents. If you're looking to adopt a Chihuahua pup and want to know how large they will be as an adult, ask the breeder/current owner if you can see the parents. If both the parents are large, there's a good chance their pups will grow to a similar large size. Keep in mind that the AKC breed standard weight for a Chihuahua is under 6 pounds, which is also the top weight listed on this chart.


5 Responses to “Chihuahua Puppy Growth Chart”

  1. Mike says:

    Thanks My dog is doing just that. thinking it was some Type of sezure.Whenever she plays she starts

    • Rachelle says:

      Hi, I Raise Chihuahuas for show. I’ve taken a couple years off and just getting back into it
      This chart has been a helpful guide to keeping track of my puppies growth as weight change or lack thereof is the first thing that indicates if a tiny puppy is doing well or may be in trouble. I weigh mine each twice a day on a food scale for the first several weeks. When they are tiny it’s the fastest and most accurate way to discover if there are any problems and there by to save a puppy who for some reason just isn’t getting as much nutrition. It is pretty accurate with future weight as well but there is always a chance of a puppy being smaller or larger. This chart is just a guide and a very useful tool as well. Thank you.

      btw, using this chart as zip have, it has helped me and people I know act quickly enough to save more then a couple puppies.Thanks again!

  2. Sherree says:

    We bought 2 chi sisters when they were 9 weeks old. They weighed 1 lb and the other was 12 oz. The vet didn’t know if she would ever make it to 3 lbs. In a few days they will be 8 months old…the 1 lb female now weights 5 lbs 7 oz (according to chart she should have ended up around 2 1/2 to 3 pounds, the other that weighed just 12 oz. is now 6 lbs. 11 oz. I seen both parents, their mother weighed 4 1/2 pounds, the father was 3 lbs. so you can NEVER go by this chart. It didn’t even come close for our two girls. Admittedly the 6 lb one is overweight…but not by 4 pounds. lol So be prepared to love your puppy no matter how big he or she gets because it may not stay the 2 to 3 pounds you thought it was going to.

  3. Shannon says:

    This growth chart was spot on! Thank u!

  4. Andrea says:

    I am a Chihuahua breeder and this is precise. Yes no one can be 100% sure of adult weight as lots of factors are involved but a good breeder should know the lines and have a good idea. I love this chart, great jobs guys.

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